#138FE6
Closest named color: Dark Sky Blue (#448EE4). oklch(63.3% 0.163 247.4), rgb(19, 143, 230).
Aa
Black text reads best on this color (6.09:1).
About this color
#138FE6 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.163 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.024 away. Black text reads best on it, at 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #138FE6 |
| RGB | rgb(19, 143, 230) |
| HSL | hsl(205, 85%, 49%) |
| OKLCH | oklch(63.3% 0.163 247.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #138FE6 | 3.44:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #138FE6 | 6.09:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #138FE6 text on white | 3.44:1 | AA large text | Lc 61.3 | Content text, not long reading |
| #138FE6 text on black | 6.09:1 | AA | Lc -40.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF9
oklch(93.6% 0.023 246)
-
Step 200
200
#C3DDF5
oklch(88.6% 0.043 246.2)
-
Step 300
300
#97C6F2
oklch(80.9% 0.08 247.2)
-
Step 400
400
#59A7EB
oklch(70.7% 0.126 247)
-
Step 500
500 (this color)
#138FE6
oklch(63.3% 0.163 247.4)
-
Step 600
600
#0077C4
oklch(55.5% 0.148 247.6)
-
Step 700
700
#0064A6
oklch(49.1% 0.131 247.6)
-
Step 800
800
#005289
oklch(42.7% 0.113 247.3)
-
Step 900
900
#004473
oklch(37.7% 0.1 247.4)
-
Step 950
950
#032845
oklch(26.9% 0.067 247.3)
#138FE6 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #6494EA | 0.058 |
| Deuteranopia (no green cones) | #4482E4 | 0.038 |
| Tritanopia (no blue cones) | #00A4AF | 0.115 |
| Achromatopsia (no color) | #8A8A8A | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #138FE6
#138FE6
oklch(63.3% 0.163 247.4)
- #C17700
#C17700
oklch(63.4% 0.14 67.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #138FE6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.024
- Chefchaouen Blue #4895EF ΔE 0.037
- Dodger Blue #1E90FF ΔE 0.038
- Water Blue #0E87CC ΔE 0.042
- Soft Blue #6488EA ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.060
- Clear Blue #247AFD ΔE 0.068
- Cool Blue #4984B8 ΔE 0.072
Use #138FE6 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.